
@page {
  size: A4;
  /* margin: 50pt 20pt 50pt; */
  margin: 70pt 60pt 70pt;
}
@page :first {
  @top-center { 
    content: "This page is intentionally left blank";
  }
}
.not-print {
  display: none;
}
img { /* 打印图片不能中断 */
  page-break-inside: avoid;
}
a[href*='//']:after
{
  content: " (" attr(href) ") ";
  color: #555;
}
div:nth-child(5n) { /* 每3个div就分页打印 */
  /* page-break-after: always; */
}